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DEBIAN-CVE-2026-44722

Type: advisorySource: OSV1 source record

pyzipper is a replacement for Python's zipfile that can read and write AES encrypted zip files. Prior to 0.4.0, a Python operator precedence bug in pyzipper/zipfile_aes.py caused the AE-2 format to never be automatically selected during encryption, causing encrypted entries to be written in AE-1 format and exposing the plaintext CRC32 checksum in the ZIP header and, for unseekable zip archives, in the datadescripter section, allowing an attacker who possesses the archive to brute-force candidate plaintexts for small or low-entropy files by comparing CRC32 values. This issue is fixed in version 0.4.0.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-44722

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-44722

python-pyzipper

Source reference: /affected/0/package/name

Affected versions
0.3.6-5

Source reference: /affected/0/versions

0.4.0-1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

python-pyzipper

Source reference: /affected/1/package/name

Affected versions
0.3.6-5

Source reference: /affected/1/versions

Fixed versions
0.4.0-1

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "python-pyzipper",
      "purl": "pkg:deb/debian/python-pyzipper?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "0.3.6-5",
      "0.4.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44722.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0.4.0-1"
          }
        ]
      }
    ],
    "package": {
      "name": "python-pyzipper",
      "purl": "pkg:deb/debian/python-pyzipper?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "0.3.6-5"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44722.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#57707 · Revision 1
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Publisher date
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